[urq] FW: Sudden lean running 10v

[Mike Del Tergo]

Brendan,
Thanks, no friendly neighborhood car close, those I did catch Francois' 81 at Mt Washington!
Engine was not fussed with while out, so pretty sure the timing is OK. As an 81 no frequency valve either.  In the interim I am cheating by upping the overall enrichment but will put a fuel pressure gauge on it when I get a chance though I doubt that went bad as the car only sat a month or so.  It has had MUCH longer inactive stretches with no I'll effects.  I'm deinately leading to electrical as in the last 2 days I R&Rd the motor mounts and found the left side motor mount to chassis ground strap chopped off.  Probably during motor pull.  I replaced it and got more enrichment but not enough.

> From: brogers at terrix.com
> To: mdeltergo at hotmail.com; urq at audifans.com
> Subject: RE: [urq] Sudden lean running 10v
> Date: Mon, 27 Jun 2011 10:04:42 -0600
> 
> No good answers here - just a few thoughts...
> 
> Did you do the t-belt - off a tooth?
> 
> Do you have a local "neighboring" car that you can compare all your
> electrical connections?
> 
> Have you re-adjusted or checked freq valve duty cycle on the DMM? 
> 
> Brandon 
> 
> 
> 
> 
> -----Original Message-----
> From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
> Of Mike Del Tergo
> Sent: Tuesday, June 21, 2011 6:38 PM
> To: urq at audifans.com
> Subject: [urq] Sudden lean running 10v
> 
> 
> 
> Ihad the engine pulled last fall to clean up the engine department and drop
> in my rebuilt rack. Finally got a chance to play around with it after the
> engine went back in and had a lot of electrical connections to correct that
> the wrench was not sure of. I have had an O2 in it for some time with an
> AFM. Car starts fine cold and hot, and shows correct very rich on cold
> start. It would always go to full rich under firm acceleration. Now after
> the engine pull, I barely get mid range AFR and dreaded pinging if I goose
> it. Car will slowly rev past 4K so IAT switch seems fine. Hwy cruise is
> fine. Both throttle switches show on/off functionality so I am at a bit of
> a loss.
> Ideas? 
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